Hydrodemetalation and hydrodesulfurization catalyst of specified macroporosity

Abstract

For a heavy hydrocarbonaceous feed, especially good hydrodemetalation and hydrodesulfurization are achieved, as well as MCR reduction, using a catalyst having 5 to 11 percent of its pore volume in the form of macropores, and a surface area greater than 75 m 2 /g. Preferably the catalyst has a peak mesopore diameter greater than 165 Å, as determined by mercury porosimetry, and an average mesopore diameter greater than 160 Å.

What is claimed is: 
     
       1. A hydrodemetalation/hydrodesulfurization catalyst comprising a hydrogenation component selected from Group VI and Group VIII metals, and an inorganic oxide refractory support, and wherein the catalyst has a. 5 to 11 percent of its pore volume in the form of macropores, and   b. a surface area greater than 75 m 2  /g of catalyst.     
     
     
       2. A catalyst in accordance with claim 1 wherein the catalyst has an average mesopore diameter greater than 160 Å. 
     
     
       3. A catalyst in accordance with claim 1 wherein the catalyst has its peak mesopore diameter of greater than 165 Å as determined by mercury porosimetry. 
     
     
       4. A catalyst in accordance with claim 1 wherein the macropore volume is between 6.5 and 10 percent. 
     
     
       5. A catalyst in accordance with claim 1 wherein the peak pore diameter is measured by mercury porosimetry is greater than 185 Å and when the average mesopore diameter is greater than 180 Å. 
     
     
       6. A catalyst in accordance with claim 1 wherein the support is alumina. 
     
     
       7. A catalyst in accordance with claim 1 wherein the Group VI metal is tungsten or molybdenum, and the Group VIII metal is cobalt or nickel. 
     
     
       8. A catalyst base comprising a. 5 to 11 percent of its pore volume in the form of macropores, and   b. a surface area greater than 75 m 2  /g of catalyst base.   
     
     
       9. A catalyst base in accordance with claim 8 wherein the base has an average mesopore diameter greater than 160 Å. 
     
     
       10. A catalyst base in accordance with claim 8 wherein the base has its peak mesopore diameter at greater than 145 Å as determined by mercury porosimetry. 
     
     
       11. A catalyst base in accordance with claim 8 wherein the macropore volume is between 6.5 and 10 percent. 
     
     
       12. A catalyst base in accordance with claim 8 wherein the peak mesopore diameter, as measured by mercury porosimetry, is greater than 165 Å and when the average mesopore diameter is greater than 180 Å. 
     
     
       13. A catalyst base in accordance with claim 8 wherein the base is alumina.